Enter the total current (amps) and the number of phases into the Calculator. The calculator will evaluate the Current Per Phase. 

Current Per Phase Formula

CPP = TC / P


  • CPP is the Current Per Phase (amps/phase)
  • TC is the total current (amps)
  • P is the number of phases

To calculate Current Per Phase, divide the total current by the number of phases.

How to Calculate Current Per Phase?

The following steps outline how to calculate the Current Per Phase.

  1. First, determine the total current (amps). 
  2. Next, determine the number of phases. 
  3. Next, gather the formula from above = CPP = TC / P.
  4. Finally, calculate the Current Per Phase.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

total current (amps) = 30

number of phases = 3

Frequently Asked Questions

What is the significance of calculating Current Per Phase in electrical systems?

Calculating Current Per Phase is crucial for designing and maintaining balanced electrical systems, ensuring efficient power distribution, and preventing overloads in any single phase, which can lead to equipment damage and safety hazards.

How does the number of phases affect electrical power systems?

The number of phases in an electrical power system affects its capacity to deliver power smoothly and efficiently. Three-phase power systems are commonly used in industrial and commercial settings because they provide a more consistent power supply compared to single-phase systems, which are typically found in residential applications.

Can the Current Per Phase formula be applied to both AC and DC systems?

While the concept of phases is primarily associated with AC (Alternating Current) systems, the formula for calculating Current Per Phase (CPP = TC / P) is specifically designed for AC systems. DC (Direct Current) systems do not have phases in the same sense as AC systems.